Hydroclimate Technical Work Group Synthesis and Summary

The HydroclimateTWG prepared a final synthesis and summary to describe the work conducted during the IUGLS related to examining the hydrology and climate of the upper Great Lakes. Focus was on changes to the contemporary hydrology and possible impacts of future climate variability and change. Projects were designed to address two primary questions: 1) What are the historical net basin supply and how have any potential changes to the water balance components affected lake levels? 2) What potential impact could variations in climate have on any future regulation of the upper Great Lakes? Methods and models used to determine historical NBS were documented, and uncertainty associated with the data used for derivation of the water balance components was discussed. Climate modelling to predict plausible future scenarios, as well paleo-climatic studies and stochastic analyses to increase our understanding of the range of conditions that could occur in the future, were also discussed.

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